"Ever since she's been going through treatment, she'll paint or color with crayons or makers," said Aubrey's mother, Vanessa Castro. "Even when she was at home and on steroids. She had an easel, it was painting and coloring? that's how the cards evolved."

Aubrey was diagnosed with leukemia last May. The family recently found out that only a small portion of federal funding goes to pediatric cancer research -- 3.8 percent, according to the Pediatric Cancer Foundation. That's when the family decided to start their fundraiser.

For the year 2014, Aubrey has a goal of selling 2014 Mother's Day Cards, which would raise over $10,000. The cards are being sold on the St. Baldrick's Foundation's website and on Etsy in exchange for a $5 donation. A printing company donated the materials. So far, they've sold about 1,500 cards.